I suspect that the fiance is going to either looking to use him, or drag him along as part of her own schemes. I don't think she is necessarily a hostile entity. At this point I'm pretty sure her purposes are best served by her fiancee being/remaining successful.
@anandamyzza it's a bit blurry, since it's also related to willpower and/or motivation. I think it's best described as a measure of a person's drive to attain goals. The odds of a person being willing to do shady shit for said goals certainly goes up as the number rises, but it's not a hard and fast measure of the person's moral compass either.
@sif99
A gold digger is someone who's just after money...oh, she's worst than that....
High ambition and politics...this is a emperor's wife who secretly controls or seeks to control an empire.
Kinda reminds of....Wu Zetian. She's even a loli.
So yeah, 100% agree that he should marry Charlotte. For above reasons....and a few "bigger" ones.